Aarti Sip
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SIP (Session Initiation Protocol) is used to initiate, manage and terminate multimedia sessions over the Internet. It supports text, voice and video sessions between one or more participants using unicast or multicast. SIP entities include user agents, proxy servers, redirect servers and registrars. SIP uses request and response message types to establish and terminate calls. It allows for call redirection, proxying and instant messaging. SIP can be used for Internet telephony between IP phones and analog phones using gateways. Additional applications include PINT and Internet call waiting. While SIP is still a proposed standard, it promises interoperability for IM and competition with H.323.
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Voice over Internet Protocol (VoIP) enables voice communication over packet-switched networks, using various protocols such as SIP for session establishment and RTP for data transfer. It offers free or cheaper calls, integration of voice and data services, and additional features like call forwarding and voicemail. Key protocols and methods used include SIP, RTP, and specific packet formats for managing calls and sessions.Sip1
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The document discusses Session Initiation Protocol (SIP) and SIP trunking. It provides information on SIP, SIP trunking, benefits of SIP trunking, and SIP Connect, which is a standards-based approach for direct IP peering between SIP-enabled IP PBXs and VoIP service provider networks. It also discusses Cbeyond, a managed service provider that has helped pioneer SIP trunking services for SMB markets.Vo Ip Rajibdeka
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The document provides an overview of Voice over IP (VoIP), detailing its architecture, protocols, and the importance of quality of service (QoS) in ensuring effective communication. Key topics include the functionalities of signaling protocols like SIP and H.323, the components involved in VoIP systems, and the economic advantages of using IP telephony over traditional systems. It concludes by highlighting ongoing challenges regarding compatibility with existing telephony infrastructures.Sip
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SIP is a signaling protocol used to establish, modify, and terminate multimedia sessions over IP networks. It was originally designed in 1996 to make voice and video calls over IP and has since expanded to support additional applications like instant messaging, file transfer, and presence information. SIP works by defining messages passed between endpoints to initiate, manage, and terminate calls or sessions. It is an application layer protocol that can operate over various transport protocols like TCP, UDP, and SCTP.sip trunking design and deployment in uc networks
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The document discusses SIP trunk design and deployment in enterprise UC networks, highlighting the benefits of using SIP over other protocols for interconnecting UC systems. It covers SIP basics, session establishment, essential features of CUCM SIP trunks, and large-scale designs, along with a detailed appendix. The presentation emphasizes SIP's growing popularity and features like improved interoperability and video support.Ad
Aarti Sip
- 1. Session Initiation Protocol (SIP) Aarti Gupta
- 2. Agenda Why do we need SIP ? The protocol Instant Messaging using SIP Internet Telephony with SIP Additional applications Future Directions
- 3. Introduction SIP is the core protocol for initiating, managing and terminating sessions in the Internet These sessions may be text, voice, video or a combination of these SIP sessions involve one or more participants and can use unicast or multicast communication.
- 4. SIP entities User Agent User Agent Client User Agent Server Proxy Server Redirect server Registrar
- 5. SIP Message Types Requests sent from client to server INVITE ACK BYE CANCEL OPTIONS REGISTER INFO
- 6. SIP Message Types (Contd.) Responses sent from server to the client Success Redirection Forwarding Request failure Server failure Global failure
- 7. Courtesy The RADVISION SIP Whitepaper
- 8. SIP Session Establishment and Call Termination From the RADVISION whitepaper on SIP
- 9. SIP Call Redirection From the RADVISION whitepaper on SIP
- 10. Call Proxying From the RADVISION whitepaper on SIP
- 11. Instant messaging based on SIP SIMPLE IM protocol based on SIP SIP promises interoperability between various IM vendors Forking proxy SIP has unique user tracking features. SIP addressing
- 12. Instant Messaging (Contd.) SIP Client SIP Client dynamic.com columbia.edu SIP Redirect server SIP proxy foo.com Location service proxy sales.foo.com 1 2 3 4 5 6 7 8 9 10 11 12 13
- 13. SIP for Internet Telephony Two types of phones IP phones and conventional analog phones. Uses phone numbers instead of IP addresses To place a call to an IP phone, DNS is used To place a call to an analog phone, gateway protocols like BGP are used
- 14. SIP Protocol Use Henning Schulzrinnes tutorial on SIP
- 15. Additional SIP applications PINT (PSTN and Internetworking) protocol Internet call waiting
- 16. What is the future of SIP SIP is still a proposed standard Competing protocol H.323 IM vendors have not adopted SIP
- 17. References Computer Telephony June 2000 http://www.radvision.com www.cs.columbia.edu/hgs/ www.networkcomputing.com www.wikipedia.com
- 18. Thank you